Description: Odd Dahl (1899-1994) was a Norwegian adventurer who had no formal scientific training but later made great contributions to research on atomic energy. He read physics while a member of Roald Amundsen's expedition to the Arctic. During the 1930s, Odd Dahl joined the staff of the Carnegie Institution in Washington as a member of the team developing the Van de Graff generator and later led Norway's atomic energy program. He is shown here with his wife Anna "Vesse" Dahl.